span{
color:red;
}
h1{
text-shadow:#333333 6px 6px 3px;
text-align:center;
}
h2{
font-family:微软雅黑；
font-style:24px;
font-weight:700;
color:gray;
text-align:center;
}
p{
text-indent:2em;
font-size:16px;
}
h3{
text-indent:2em;
font-size:16px;
}
.s1{
text-align:center;
}
.s2{
font-style:italic;
font-size:14px;
}
.s3{
text-align:left;
}
.s4{
text-align:center;
}